WO2023050844A1

WO2023050844A1 - Method and apparatus for controlling hot water supply device, and hot water supply device

Info

Publication number: WO2023050844A1
Application number: PCT/CN2022/095460
Authority: WO
Inventors: 张嘉诚; 刘峻杉; 刘汇泉; 李旭; 夏鹏
Original assignee: 青岛海尔空调电子有限公司; 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2021-09-30
Filing date: 2022-05-27
Publication date: 2023-04-06
Also published as: CN113983692A; CN113983692B

Abstract

A method for controlling a hot water supply device, relating to the technical field of hot water supply, comprising: determining the discharge superheat of a compressor; when the discharge superheat is greater than a first threshold, determining a control scheme for a hot water supply device according to the outlet water temperature of a heat exchanger of the hot water supply device and a saturation temperature corresponding to the pressure on a refrigerant side of the heat exchanger; and controlling the hot water supply device to execute the control scheme. In this way, after the hot water supply device is controlled to execute the scheme, the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger can gradually approach the outlet water temperature of the heat exchanger, effectively enhancing the energy efficiency and stability of device operation. Also disclosed are an apparatus for controlling a hot water supply device and a hot water supply device.

Description

Method and device for controlling hot water supply equipment and hot water supply equipment

This application is based on a Chinese patent application with application number 202111165911.6 and a filing date of September 30, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present application relates to the technical field of hot water supply, for example, to a method and device for controlling hot water supply equipment and hot water supply equipment.

Background technique

At present, during the operation of the hot water supply equipment, in some cases, the energy efficiency of the hot water supply equipment decreases and the energy consumption increases due to high exhaust pressure. However, the control methods of the existing hot water supply equipment are all to increase the exhaust superheat degree when the exhaust superheat degree is low, so that the hot water equipment has sufficient superheat degree to ensure the stable operation of the equipment. However, this control method can only ensure the stable operation of the equipment, and cannot further reduce the energy consumption of the equipment to meet the needs of users on the premise of stable operation of the equipment.

Therefore, on the premise of ensuring the stable operation of the equipment, how to further reduce the energy consumption of the equipment has become an urgent technical problem to be solved.

Contents of the invention

In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is presented below. The summary is not intended to be an extensive overview nor to identify key/important elements or to delineate the scope of these embodiments, but rather serves as a prelude to the detailed description that follows.

Embodiments of the present disclosure provide a method and device for controlling hot water supply equipment and the hot water supply equipment, so as to further reduce energy consumption of the equipment on the premise that the hot water supply equipment runs stably.

In some embodiments, the method includes: determining the exhaust superheat of the compressor; when the exhaust superheat is greater than a first threshold, according to the outlet water temperature of the heat exchanger of the hot water supply equipment and the refrigerant of the heat exchanger The saturation temperature corresponding to the pressure on the side determines the control scheme of the hot water supply equipment; controls the hot water supply equipment to execute the control scheme.

In some embodiments, the method includes: calculating the difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the outlet water temperature of the heat exchanger of the hot water supply device; determining the hot water supply according to the absolute value of the difference Device control scheme.

In some embodiments, the method includes: when the absolute value of the difference is greater than a second threshold, increasing the opening of the expansion valve on the outlet side of the heat exchanger as a control scheme for the hot water supply device; When the absolute value of is less than or equal to the second threshold, the determined control scheme of the compressor is used as the control scheme of the hot water supply device; wherein the second threshold is lower than the first threshold.

In some embodiments, the method includes: obtaining the set temperature of the hot water supply equipment; when the temperature difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the set temperature is greater than a third threshold, the temperature will be reduced The operating frequency of the compressor is determined as a control scheme of the compressor; wherein, the third threshold is lower than the second threshold.

In some embodiments, the method includes: controlling the hot water supply device to stop executing the control scheme when the temperature difference between the saturation temperature corresponding to the refrigerant side pressure of the heat exchanger and the set temperature is less than a third threshold.

In some embodiments, the method includes: according to a preset corresponding relationship, determining a control scheme corresponding to the outlet water temperature and saturation temperature of the heat exchanger of the hot water supply equipment as the control scheme of the hot water supply equipment.

In some embodiments, the method includes: obtaining the discharge temperature of the compressor and the saturation temperature corresponding to the discharge pressure of the compressor; determining the difference between the discharge temperature and the saturation temperature as the discharge superheat of the compressor .

In some embodiments, the method includes: when the degree of superheat of the exhaust gas is less than or equal to the first threshold, reducing the opening degree of the expansion valve at the outlet side of the heat exchanger to increase the degree of superheat of the exhaust gas.

In some embodiments, the apparatus includes: a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned method for controlling a hot water supply device when executing the program instructions.

In some embodiments, the hot water supply equipment includes: the aforementioned device for controlling the hot water supply equipment.

The method and device for controlling hot water supply equipment and the hot water supply equipment provided by the embodiments of the present disclosure can achieve the following technical effects: by determining the exhaust superheat of the compressor, and when the exhaust superheat is greater than the first threshold Under certain circumstances, it is determined that the exhaust superheat of the compressor is sufficient to maintain the stable operation of the hot water supply equipment, and combined with the acquired water outlet temperature of the heat exchanger and the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger, determine the Energy consumption control scheme, and control the hot water supply equipment to implement the scheme. In this way, after the hot water supply equipment is controlled to implement this scheme, the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger can be made as close as possible to the outlet water temperature of the heat exchanger, effectively enhancing the energy efficiency and stability of equipment operation.

The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by the corresponding drawings, and these exemplifications and drawings do not constitute a limitation to the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings are not limited to scale and in which:

FIG. 1 is a schematic diagram of a method for controlling a hot water supply device provided by an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a method for determining a control scheme provided by an embodiment of the present disclosure;

Fig. 3 is a schematic diagram of a method for determining a compressor control scheme provided by an embodiment of the present disclosure;

Fig. 4 is a schematic diagram of another method for controlling hot water supply equipment provided by an embodiment of the present disclosure;

Fig. 5 is a schematic diagram of a method for determining the degree of superheat of exhaust gas provided by an embodiment of the present disclosure;

Fig. 6 is a schematic diagram of an apparatus for controlling hot water supply equipment provided by an embodiment of the present disclosure.

Detailed ways

In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present disclosure. In the following technical description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawings.

The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances so as to facilitate the embodiments of the disclosed embodiments described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion.

Unless stated otherwise, the term "plurality" means two or more.

In the embodiments of the present disclosure, the character "/" indicates that the preceding and following objects are an "or" relationship. For example, A/B means: A or B.

The term "and/or" is an associative relationship describing objects, indicating that there can be three relationships. For example, A and/or B means: A or B, or, A and B, these three relationships.

The term "correspondence" may refer to an association relationship or a binding relationship, and the correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

Fig. 1 is a schematic diagram of a method for controlling hot water supply equipment provided by an embodiment of the present disclosure; in combination with Fig. 1 , an embodiment of the present disclosure provides a method for controlling hot water supply equipment, the hot water supply equipment includes machine; methods include:

S11, the hot water supply equipment determines the superheat degree of the exhaust gas of the compressor.

S12. When the degree of superheat of the exhaust gas is greater than the first threshold, the hot water supply equipment determines a control scheme for the hot water supply equipment according to the saturation temperature corresponding to the outlet water temperature of the heat exchanger and the pressure on the refrigerant side of the heat exchanger.

S13, the hot water supply equipment controls its implementation of the control scheme.

In this solution, the hot water supply device may be a household appliance capable of supplying hot water to users. In one example, the hot water supply device may be a water heater. Specifically, the hot water supply equipment is equipped with a compressor, the exhaust port of the compressor is connected to the inlet of the heat exchanger, the outlet of the heat exchanger is connected to the expansion valve, and the other end of the expansion valve is the refrigerant of the hot water supply equipment. import. Specifically, during the operation of the hot water supply equipment, the hot water supply equipment may determine the degree of superheat of the exhaust gas of the compressor, so as to judge the operation status of the hot water supply equipment. Specifically, the hot water supply device can acquire the discharge pressure of the compressor. And through the preset corresponding relationship between the discharge pressure of the compressor and the saturation temperature, the obtained saturation temperature corresponding to the discharge pressure of the compressor is determined. And after obtaining the discharge temperature of the compressor, the difference between the discharge temperature and the saturation temperature is determined as the discharge superheat of the compressor. Further, it can be determined whether the exhaust superheat of the compressor can maintain the stable operation of the hot water supply equipment. Therefore, the first threshold can be preset. Here, the first threshold may be the exhaust superheat of the compressor sufficient to maintain the stable operation of the hot water supply equipment. Understandably, the first threshold may be preset in combination with the operating frequency of the compressor or the ambient temperature. Further, when the hot water supply equipment determines that the exhaust superheat degree is greater than the first threshold, it can be determined that the exhaust superheat degree of the compressor is sufficient to maintain the stable operation of the hot water supply equipment, so that the hot water supply equipment can be stably operated. Under the premise, the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger of the hot water supply equipment is adjusted so that it is as close as possible to the outlet water temperature of the heat exchanger, so as to effectively improve the energy efficiency of the hot water supply equipment. Specifically, the hot water supply equipment can obtain the outlet water temperature of the heat exchanger of the hot water supply equipment and the pressure on the refrigerant side of the heat exchanger through the sensor, and use the pre-stored correspondence between the pressure on the refrigerant side of the heat exchanger and the saturation temperature, Determine the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger. In this way, the control scheme of the hot water supply equipment for adjusting the energy consumption of the equipment can be determined in combination with the outlet water temperature of the heat exchanger and the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger. And control the hot water supply equipment to implement the determined control scheme.

Using the method for controlling hot water supply equipment provided by the embodiments of the present disclosure, by determining the exhaust superheat of the compressor, and in the case that the exhaust superheat is greater than the first threshold, it is determined that the exhaust superheat of the compressor is sufficient Maintain the stable operation of the hot water supply equipment, and combine the acquired water outlet temperature of the heat exchanger and the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger to determine a control scheme for reducing equipment energy consumption and control the hot water supply equipment Execute the program. In this way, after the hot water supply equipment is controlled to implement this scheme, the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger can be made as close as possible to the outlet water temperature of the heat exchanger, effectively enhancing the energy efficiency and stability of equipment operation.

Fig. 2 is a schematic diagram of a method for determining a control scheme provided by an embodiment of the present disclosure; in combination with Fig. 2 , optionally, in S12, the hot water supply equipment Corresponding to the saturation temperature, determine the control scheme of the hot water supply equipment, including:

S21. The hot water supply device calculates the difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the outlet water temperature of the heat exchanger of the hot water supply device.

S22. The hot water supply equipment determines a control scheme for the hot water supply equipment according to the absolute value of the difference.

In the embodiment of the present disclosure, after obtaining the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the outlet water temperature of the heat exchanger of the hot water supply equipment, the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the hot water temperature can be calculated. The difference in the temperature of the water leaving the heat exchangers supplying the equipment. In this way, the deviation between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the outlet water temperature of the heat exchanger is judged. It can be understood that when the hot water supply equipment is running for heating, the outlet water temperature of the heat exchanger will be slightly higher than the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger. When the hot water supply equipment is running for refrigeration, the outlet water temperature of the heat exchanger will be slightly lower than the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger. Therefore, in order to effectively reduce the energy consumption of the system under the premise of the stable operation of the hot water supply equipment, the absolute value of the difference can be determined, and combined with the determined absolute value, the control scheme of the hot water supply equipment can be determined. Here, the control scheme of the hot water supply equipment may include a control scheme of a compressor or a control scheme of an expansion valve. In this way, on the premise that the hot water supply equipment operates stably, a more reasonable control scheme for the hot water supply equipment can be determined to effectively reduce energy consumption.

Optionally, in S22, the hot water supply device determines a control scheme for the hot water supply device according to the absolute value of the difference, including:

If the absolute value of the difference is greater than the second threshold, the hot water supply equipment will increase the opening of the expansion valve at the outlet side of the heat exchanger as a control scheme for the hot water supply equipment.

If the absolute value of the difference is less than or equal to the second threshold, the hot water supply device uses the determined control scheme of the compressor as the control scheme of the hot water supply device.

Wherein, the second threshold is lower than the first threshold.

In the embodiment of the present disclosure, after determining the absolute value of the difference, if the absolute value of the difference is larger, it proves that the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger is farther from the outlet water temperature of the heat exchanger. The smaller the absolute value of the value, it proves that the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger is closer to the outlet water temperature of the heat exchanger. It can be understood that a more reasonable air-conditioning control scheme can be determined by considering the deviation between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the outlet water temperature of the heat exchanger. Specifically, the second threshold can be set in the hot water supply device. Here, the second threshold may be preset in the hot water supply device. For example, the second threshold may be 1. Further, when the absolute value of the difference is greater than the second threshold, increasing the opening degree of the expansion valve at the outlet side of the heat exchanger may be used as a control scheme for the hot water supply equipment. In this way, when the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger is farther from the outlet water temperature of the heat exchanger, the opening of the expansion valve on the outlet side of the heat exchanger can be increased to effectively increase the temperature of the heat exchanger. The refrigerant flow rate on the outlet side further reduces the difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the outlet water temperature of the heat exchanger, effectively improving the energy efficiency of equipment operation. In another example, when the absolute value of the difference is less than or equal to the second threshold, the determined control scheme of the compressor may be used as the control scheme of the hot water supply device. In this way, when the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger is close to the outlet water temperature of the heat exchanger, in order to further adjust the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger to make it as close as possible to The outlet water temperature of the heat exchanger. The operating frequency of the compressor can be adjusted to further reduce the difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the outlet water temperature of the heat exchanger by adjusting the operating state of the compressor, effectively improving the energy efficiency of equipment operation .

Optionally, as an optimized solution, increasing the opening of the expansion valve on the outlet side of the heat exchanger may include: controlling the expansion valve to increase the speed of the Z step every S1 seconds to increase the opening of the expansion valve on the outlet side of the heat exchanger. expansion valve opening. Here, S1 and Z can be set in advance. For example, S1 can be 20 seconds, and Z can be 5 steps. In this way, the opening of the expansion valve can be increased periodically to prevent system instability caused by too fast increase of the opening of the expansion valve.

Fig. 3 is a schematic diagram of a method for determining a compressor control scheme provided by an embodiment of the present disclosure; in combination with what is shown in Fig. 3 , optionally, the hot water supply device determines a compressor control scheme, including:

S31, the hot water supply device acquires its set temperature.

S32. When the temperature difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the set temperature is greater than the third threshold, the hot water supply equipment will reduce the operating frequency of the compressor and determine it as a control scheme for the compressor.

Wherein, the third threshold is lower than the second threshold.

In this solution, if it is determined that the absolute value of the difference is less than or equal to the second threshold, it is necessary to determine the control scheme of the compressor, so as to determine the control scheme of the compressor as the control scheme of the hot water supply device. Specifically, the set temperature of the hot water supply equipment can be obtained, and the temperature difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the set temperature can be calculated, and when the temperature difference is greater than the third threshold, the The operating frequency of the compressor is determined as a control scheme for the compressor. Here the third threshold is smaller than the second threshold. In an example, the third threshold may be set to 0.5. In this way, when the temperature difference value is greater than the third threshold and less than the second threshold, the temperature difference between the saturation temperature and the set temperature corresponding to the pressure on the refrigerant side of the heat exchanger can be further reduced by reducing the operating frequency of the compressor, effectively improving the performance of the equipment. Energy efficiency of operation.

Optionally, as an optimized solution, reducing the operating frequency of the compressor may include: controlling the compressor to reduce the operating frequency of the compressor at a rate of 1 Hz every S2 seconds. Here, S2 can be set in advance. For example, S2 can be 10 seconds. In this manner, the operating frequency of the compressor can be periodically reduced, preventing system instability caused by the excessively fast reduction of the operating frequency of the compressor.

Fig. 4 is a schematic diagram of another method for controlling a hot water supply device provided by an embodiment of the present disclosure; in combination with what is shown in Fig. 4 , an embodiment of the present disclosure provides another method for controlling a hot water supply device, including:

S41, the hot water supply equipment determines the superheat degree of the exhaust gas of the compressor.

S42. When the degree of superheat of the exhaust gas is greater than the first threshold, the hot water supply equipment determines a control scheme for the hot water supply equipment according to the saturation temperature corresponding to the outlet water temperature of the heat exchanger and the pressure on the refrigerant side of the heat exchanger.

S43, the hot water supply equipment controls its implementation of the control scheme.

S44, in the case that the temperature difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the set temperature is less than a third threshold, the hot water supply device controls it to stop executing the control scheme.

In this scheme, after the hot water supply equipment controls it to execute the control scheme, the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger will gradually approach the outlet water temperature of the heat exchanger. Therefore, when it is determined that the temperature difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the set temperature is less than the third threshold, it can be determined that the current hot water supply equipment does not need to adjust the saturation temperature, and it can be controlled to stop the execution The control scheme ends by adjusting the saturation temperature. In this way, the timing of stopping the operation of the control scheme is determined more accurately, and the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger is effectively stopped when the saturation temperature is close to the outlet water temperature of the heat exchanger, effectively saving heat. Treatment resources for water supply equipment.

Optionally, in S12, the hot water supply equipment determines a control scheme for the hot water supply equipment according to the outlet water temperature of the heat exchanger and the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger, including:

According to the preset corresponding relationship, the hot water supply equipment determines the control scheme corresponding to the outlet water temperature and saturation temperature of its heat exchanger as the control scheme of the hot water supply equipment.

In the embodiments of the present disclosure, it can be understood that according to the test experience of those skilled in the art, the corresponding relationship can also be pre-stored in the hot water supply equipment, the corresponding relationship is the outlet water temperature of the heat exchanger, the refrigerant side of the heat exchanger The corresponding relationship between the saturation temperature corresponding to the pressure and the control scheme of the hot water supply equipment. Further, after the hot water supply equipment acquires the saturation temperature corresponding to the outlet water temperature of the heat exchanger and the pressure on the refrigerant side of the heat exchanger, determine the saturation temperature corresponding to the outlet water temperature of the heat exchanger and the pressure on the refrigerant side of the heat exchanger The corresponding control scheme is determined as the control scheme of the hot water supply equipment. In this way, on the premise that the hot water supply equipment operates stably, a more reasonable control scheme for the hot water supply equipment can be determined to effectively reduce energy consumption.

Fig. 5 is a schematic diagram of a method for determining the exhaust superheat provided by an embodiment of the present disclosure; in combination with Fig. 5 , optionally, S11, the hot water supply device determines the exhaust superheat of the compressor, including:

S51. The hot water supply equipment obtains the discharge temperature of the compressor and the saturation temperature corresponding to the discharge pressure of the compressor.

S52. The hot water supply equipment determines the difference between the discharge temperature and the saturation temperature as the discharge superheat of the compressor.

In this solution, the hot water supply equipment can obtain the discharge pressure of the compressor. And through the preset corresponding relationship between the discharge pressure of the compressor and the saturation temperature, the obtained saturation temperature corresponding to the discharge pressure of the compressor is determined. And after obtaining the discharge temperature of the compressor, the difference between the discharge temperature and the saturation temperature is determined as the discharge superheat of the compressor. In this way, an accurate data basis can be provided for judging whether the equipment is running stably.

Optionally, when the degree of superheat of the exhaust gas is less than or equal to the first threshold, the hot water supply device reduces the opening degree of the expansion valve at the outlet side of the heat exchanger to increase the degree of superheat of the exhaust gas.

In this solution, after the hot water supply equipment determines the exhaust superheat of the compressor, if the exhaust superheat of the compressor is low, or even lower than the first threshold, it is determined that the current compressor exhaust superheat cannot be maintained For the stable operation of hot water supply equipment, it is necessary to increase the current exhaust superheat. In one example, the opening of the expansion valve at the outlet side of the heat exchanger can be reduced to reduce the refrigerant flow rate at the outlet side of the heat exchanger, thereby increasing the current exhaust superheat degree of the compressor. With this solution, when the degree of superheat of the compressor is lower than the first threshold, the degree of superheat of the compressor can be effectively increased by controlling the opening of the expansion valve, thereby further ensuring the stable operation of the hot water supply equipment.

An embodiment of the present disclosure provides an apparatus for controlling a hot water supply device, including a first determination module, a second determination module, and a control module. The first determination module is configured to determine the degree of superheat of the exhaust gas of the compressor; the second determination module is configured to, in the case that the degree of superheat of the exhaust gas is greater than the first threshold, The saturation temperature corresponding to the pressure on the refrigerant side of the heater determines the control scheme of the hot water supply equipment; the control module is configured to control the hot water supply equipment to execute the control scheme.

Using the device for controlling hot water supply equipment provided by an embodiment of the present disclosure, by determining the exhaust superheat of the compressor, and in the case that the exhaust superheat is greater than the first threshold, it is determined that the exhaust superheat of the compressor is sufficient Maintain the stable operation of the hot water supply equipment, and combine the acquired water outlet temperature of the heat exchanger and the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger to determine a control scheme for reducing equipment energy consumption and control the hot water supply equipment Execute the program. In this way, after the hot water supply equipment is controlled to implement this scheme, the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger can be made as close as possible to the outlet water temperature of the heat exchanger, effectively enhancing the energy efficiency and stability of equipment operation.

Fig. 6 is a schematic diagram of an apparatus for controlling hot water supply equipment provided by an embodiment of the present disclosure; in combination with what is shown in Fig. 6, an embodiment of the present disclosure provides an apparatus for controlling hot water supply equipment, including a processor 100 and memory 101 . Optionally, the device may also include a communication interface (Communication Interface) 102 and a bus 103. Wherein, the processor 100 , the communication interface 102 , and the memory 101 can communicate with each other through the bus 103 . Communication interface 102 may be used for information transfer. The processor 100 can call the logic instructions in the memory 101 to execute the method for controlling the hot water supply device in the above embodiments.

In addition, the above logic instructions in the memory 101 may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as an independent product.

As a computer-readable storage medium, the memory 101 can be used to store software programs and computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the program instructions/modules stored in the memory 101 to execute functional applications and data processing, that is, to implement the method for controlling the hot water supply device in the above-mentioned embodiments.

The memory 101 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a non-volatile memory.

An embodiment of the present disclosure provides a hot water supply device, including the above-mentioned device for controlling the hot water supply device.

An embodiment of the present disclosure provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are configured to execute the above-mentioned method for controlling a hot water supply device.

An embodiment of the present disclosure provides a computer program product, the computer program product includes a computer program stored on a computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer, the The computer executes the above method for controlling the hot water supply equipment.

The above-mentioned computer-readable storage medium may be a transitory computer-readable storage medium, or a non-transitory computer-readable storage medium.

The technical solutions of the embodiments of the present disclosure can be embodied in the form of software products, which are stored in a storage medium and include one or more instructions to make a computer device (which can be a personal computer, a server, or a network equipment, etc.) to perform all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc. A medium that can store program code, or a transitory storage medium.

The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, procedural, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. Also, the terms used in the present application are used to describe the embodiments only and are not used to limit the claims. As used in the examples and description of the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well unless the context clearly indicates otherwise . Similarly, the term "and/or" as used in this application is meant to include any and all possible combinations of one or more of the associated listed ones. Additionally, when used in this application, the term "comprise" and its variants "comprises" and/or comprising (comprising) etc. refer to stated features, integers, steps, operations, elements, and/or The presence of a component does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groupings of these. Without further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of additional identical elements in the process, method or apparatus comprising said element. Herein, what each embodiment focuses on may be the difference from other embodiments, and the same and similar parts of the various embodiments may refer to each other. For the method, product, etc. disclosed in the embodiment, if it corresponds to the method part disclosed in the embodiment, then the relevant part can refer to the description of the method part.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software may depend on the specific application and design constraints of the technical solution. Said artisans may implement the described functions using different methods for each particular application, but such implementation should not be regarded as exceeding the scope of the disclosed embodiments. The skilled person can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units may only be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined Or it can be integrated into another system, or some features can be ignored, or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the disclosure. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions. In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than that disclosed in the description, and sometimes there is no specific agreement between different operations or steps. order. For example, two consecutive operations or steps may, in fact, be performed substantially concurrently, or they may sometimes be performed in the reverse order, depending upon the functionality involved. Each block in the block diagrams and/or flowcharts, and combinations of blocks in the block diagrams and/or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by dedicated hardware implemented in combination with computer instructions.

Claims

A method for controlling a hot water supply device, the hot water supply device comprising a compressor, characterized in that the method comprises:

determining the discharge superheat of the compressor;

When the degree of superheat of the exhaust gas is greater than the first threshold, the hot water supply is determined according to the outlet water temperature of the heat exchanger of the hot water supply equipment and the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger. equipment control scheme;

The hot water supply device is controlled to execute the control scheme.
The method according to claim 1, wherein the control scheme of the hot water supply equipment is determined according to the outlet water temperature of the heat exchanger of the hot water supply equipment and the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger ,include:

calculating the difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the outlet water temperature of the heat exchanger of the hot water supply device;

According to the absolute value of the difference, a control scheme for the hot water supply device is determined.
The method according to claim 2, wherein the determining the control scheme of the hot water supply equipment according to the absolute value of the difference comprises:

When the absolute value of the difference is greater than the second threshold, increasing the opening of the expansion valve on the outlet side of the heat exchanger is used as a control scheme for the hot water supply equipment;

When the absolute value of the difference is less than or equal to the second threshold, use the determined control scheme of the compressor as the control scheme of the hot water supply device;

Wherein, the second threshold is lower than the first threshold.
The method according to claim 3, wherein the control scheme of the compressor can be determined in the following manner, comprising:

Obtain the set temperature of the hot water supply equipment;

When the temperature difference between the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger and the set temperature is greater than the third threshold, the operating frequency of the compressor will be reduced, which is determined as the control scheme of the compressor;

Wherein, the third threshold is lower than the second threshold.
The method according to claim 4, characterized in that, after controlling the hot water supply equipment to execute the control scheme, the method further comprises:

In a case where the temperature difference between the saturation temperature corresponding to the refrigerant side pressure of the heat exchanger and the set temperature is less than a third threshold, the hot water supply equipment is controlled to stop executing the control scheme.
The method according to claim 1, characterized in that, according to the outlet water temperature of the heat exchanger of the hot water supply equipment and the saturation temperature corresponding to the pressure on the refrigerant side of the heat exchanger, the temperature of the hot water supply equipment is determined. Control programs, including:

According to the preset corresponding relationship, the control scheme corresponding to the outlet water temperature of the heat exchanger of the hot water supply equipment and the saturation temperature is determined as the control scheme of the hot water supply equipment.
The method according to claim 1, wherein said determining the exhaust superheat of the compressor comprises:

Obtaining the discharge temperature of the compressor and the saturation temperature corresponding to the discharge pressure of the compressor;

The difference between the discharge temperature and the saturation temperature is determined as the discharge superheat of the compressor.
The method according to claim 1, characterized in that, after determining the exhaust superheat of the compressor, the method further comprises:

When the degree of superheat of the exhaust gas is less than or equal to the first threshold, the opening degree of the expansion valve on the outlet side of the heat exchanger is decreased to increase the degree of superheat of the exhaust gas.
A device for controlling hot water supply equipment, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute any one of claims 1 to 8 when running the program instructions. A method for controlling a hot water supply device as described.
A hot water supply device, the hot water supply device comprising a compressor, characterized in that it further comprises the device for controlling the hot water supply device as claimed in claim 9 .